Substrate processing system and substrate processing method

ABSTRACT

A substrate processing system includes a processing chamber that performs a preset process on a plurality of substrates in a batch-type manner; a substrate mounting table, installed within the processing chamber, configured to mount the plurality of substrates on a concentric circle and configured to be rotatable forward and backward; substrate accommodation units configured to accommodate the plurality of substrates in multi-stages in a vertical direction; substrate holders and configured to transfer the substrates between the substrate accommodation units and the processing chamber; elevating mechanisms configured to move the substrate accommodation units up and down. Unprocessed substrates are mounted on the substrate mounting table while the substrate mounting table is being rotated in one direction. After the completion of the processing of the substrates, unloading of processed substrates and loading of new unprocessed substrates are performed while the substrate mounting table is rotated in the another direction.

FIELD OF THE INVENTION

The present disclosure relates to a substrate processing system and asubstrate processing method for performing a preset process on aplurality of substrates in a batch-type manner.

BACKGROUND OF THE INVENTION

For example, in a manufacturing process of a semiconductor device,various processes such as an ion implanting process, an etching process,and a film forming process are performed on a substrate. In a batch-typeprocessing apparatus such as an ion implanting apparatus that processesa plurality of substrates in a processing chamber, it is desirable toperform the unloading of a processed substrate from the processingchamber and the loading of a unprocessed substrate into the processingchamber at the same time, thus allowing the replacement of the processedsubstrate with the unprocessed substrate to be carried out in a shortperiod of time. It is because the processing apparatus enters a standbymode and stops operation when the replacement of the processed substrateand the unprocessed substrate is performed, thus causing deteriorationof a throughput of the processing apparatus.

In this regard, as disclosed in, for example, Patent Document 1, therehas been conventionally proposed a substrate transfer apparatus in whichsubstrate accommodation unit for storing therein substrates inmulti-stages and transfer arms for transferring a substrate between thesubstrate accommodation unit and the processing chamber areindependently installed for loading and unloading of the substrates intoand out of the processing chamber.

In using the substrate transfer apparatus disclosed in, for example,Patent Document 1, the substrate processing apparatus still enters thestandby mode, for example, when unprocessed substrates in anothersubstrate accommodation vessel installed outside the system aretransferred into the substrate accommodation unit by another transferarm after all the substrates in the substrate accommodation unit areloaded into the processing chamber. In this regard, Patent Document 2,for example, discloses a transfer arm having a plurality of substrateholders in multi-stages as a means for transferring of the substratesbetween a multi-stage substrate accommodation unit and another transferarm.

Patent Document 1: Japanese Patent Laid-open Publication No. H5-67668

Patent Document 2: Japanese Patent Laid-open Publication No. 2007-123592

BRIEF SUMMARY OF THE INVENTION

However, even if the transfer of the substrates between the substrateaccommodation unit and another transfer arm is carried out efficiently,a final throughput of the processing apparatus is determined dependingon the time required for the replacement of the processed substrate withthe unprocessed substrate within the processing apparatus. Further, thetransfer arm disclosed in, e.g., Patent Document 1 takes various motionssuch as an elevating motion for accessing an accommodation height ofeach substrate within the substrate accommodation unit, a translatingmotion for approaching an accommodation position of each substratewithin the substrate accommodation unit after the elevating motion, asubstrate transferring motion for transferring the substrate to/from thesubstrate accommodation unit by being moved up and down below thesubstrate, and so forth when it transfers the substrate to/from thesubstrate accommodation units. Therefore, it has been difficult toreduce the operation time of the transfer arm. Thus, the presentinventors have conducted various researches to reduce the time requiredfor the replacement of the substrates within the processing chamber andconceived a transfer arm as described below, for example.

As illustrated in FIGS. 24 and 25, a transfer apparatus 100 includes,for example, a substrate accommodation unit 102 configured toaccommodate substrates W to be loaded into a processing apparatus 101,which performs batch processing on the substrates W, in multi-stages; asubstrate accommodation unit 103 configured to accommodate processedsubstrates Wa, which are unloaded from the processing apparatus 101, inmulti-stages; a substrate holder 104 configured to hold the substrates Wof the substrate accommodation unit 102 so as to load them into theprocessing chamber 101; a substrate holder 105 configured to hold thesubstrates Wa of the processing apparatus 101 so as to unload them fromthe substrate accommodation unit 103 and accommodate the unloadedsubstrates Wa in the substrate accommodation unit 103. The substrateaccommodation units 102 and 103 are configured to be vertically movable.The substrate holders 104 and 105 and supports 110 installed within thesubstrate accommodation units 102 and 103 so as to support thesubstrates are configured such that the substrate holders 104 and 105and supports 110 can pass each other without interference.

In the transfer apparatus 100 as described above, the substrate holder104 is first set in a standby position below the substrate accommodationunit 102, for example. In this state, the substrate accommodation unit102 is lowered, whereby a substrate held by the supports 110 istransferred onto the substrate holder 104 when the supports 110 and thesubstrate holder 104 pass each other, as illustrated in FIG. 25. Thetransfer of the substrate between the supports 110 and the substrateholder 104 is carried out by moving the substrate holder 104 to atransfer position of the substrate after mounting the substrate held bythe substrate holder 104 onto a rotary table 111 within the processingapparatus 101 and then lowering the substrate accommodation unit 102again by a distance which is an interval between the supports 110.Accordingly, when the substrate is transferred between the supports 110and the substrate holder 104, the conventionally performed elevatingmotion for elevating the substrate holder 104 so as to allow it toaccess the accommodation height of each substrate in the substrateaccommodation unit 102, the translating motion for horizontally movingthe substrate holder toward the substrate accommodation position withinthe substrate accommodation unit 102 after the elevating motion, and thesubstrate transferring motion for elevating the substrate holder 104from below the substrate to thereby allow the substrate to betransferred from/to the substrate accommodation unit become unnecessary.Further, by applying this transfer method to the substrate accommodationunit 103 and the substrate holder 105 in a reverse sequence to theabove-described sequence, the transfer method can also be used to unloada processed substrate from the processing apparatus 101. Thus, the timefor the replacement of the substrates W and Wa between the processingapparatus 101 and the substrate accommodation units 102 and 103 can beshortened, so that the throughput of the processing apparatus 101 can befurther improved.

When, however, the transfer arm having the plurality of multi-stagesubstrate holders is used between the substrate accommodation units 102and 103 provided in the transfer apparatus 100 and the substrateaccommodation vessel installed outside a system, as disclosed in theabove-mentioned Patent Document 2, it involves a new problem.

The new problem is described in the following. When theloading/unloading of the substrate into/from the processing apparatus101 is performed by using the transfer apparatus 100, the substrates Ware accommodated from outside a system into the substrate accommodationunit 102 in the order of the substrate W1 from the bottom. Then, whenthey are unloaded from the processing apparatus 1 after their processinghas been completed in the processing apparatus 101, the substrates W areaccommodated in the substrate accommodation unit 103 by the substrateholder 101 in the order of the substrate W1 from the top. That is, thepositions of the substrates W are reversed to their original positions.This reversal of the substrate positions is caused because the transferof the substrates onto the substrate holder 14 is performed in the orderof W1 from the bottom by lowering the substrate accommodation unit 102when the substrates are unloaded from the substrate accommodation unit102, whereas the accommodation of the processed substrates in thesubstrate accommodation unit 103 is performed in the order of Wa1 fromthe top.

If the transfer arm having the plurality of multi-stage substrateholders is used when the order of the substrates is reversed, the orderof the substrates remains reversed when they are accommodated in thesubstrate accommodation vessel outside the system, thus causing problemsin post processes.

In view of the foregoing, the present disclosure is capable oftransferring substrates between a processing apparatus and a substrateaccommodation unit in a shorter period of time as compared toconventional cases, while maintaining the original order of theprocessed substrate to be accommodated in the substrate accommodationunit.

In accordance with one aspect of the present disclosure, there isprovided a substrate processing system including: a processing chamberthat performs a preset process on a plurality of substrates in abatch-type manner; a substrate mounting table, installed within theprocessing chamber, configured to mount the plurality of substrates on aconcentric circle and to be rotatable forward and backward; a firstsubstrate accommodation unit configured to accommodate the plurality ofsubstrates in multi-stages in a vertical direction; a second substrateaccommodation unit configured to accommodate the plurality of substratesin multi-stages in a vertical direction; a first substrate holderconfigured to hold the substrate transferred between the first substrateaccommodation unit and the processing chamber; a second substrate holderconfigured to hold the substrate transferred between the secondsubstrate accommodation unit and the processing chamber; a firstelevating mechanism configured to transfer the substrate between thefirst substrate accommodation unit and the first substrate holder by wayof moving at least one of the first substrate accommodation unit and thefirst substrate holder up and down relative to each other; a secondelevating mechanism configured to transfer the substrate between thesecond substrate accommodation unit and the second substrate holder byway of moving at least one of the second substrate accommodation unitand the second substrate holder up and down relative to each other; anda controller that controls a rotation of the substrate mounting table,an up/down movement of the first and second elevating mechanisms and thetransfer of the substrates by the first and second substrate holders.The controller performs: a control so as to transfer unprocessedsubstrates from the first substrate accommodation unit to the firstsubstrate holder by way of lowering the first substrate accommodationunit for accommodating the unprocessed substrates relative to the firstsubstrate holder, and load the unprocessed substrates into theprocessing chamber in sequence by the first substrate holder whilesequentially rotating the substrate mounting table at a preset angle inone direction; a control so as to perform the preset process on theplurality of substrates within the processing chamber; and a control soas to unload processed substrates from the processing chamber by thefirst substrate holder after the completion of the preset process;transfer the processed substrates into the first substrate accommodationunit from the first substrate holder by way of raising the firstsubstrate accommodation unit relative to the first substrate holder;transfer unprocessed substrates from the second substrate accommodationunit onto the second substrate holder by way of lowering the secondsubstrate accommodation unit for accommodating the unprocessedsubstrates relative to the second substrate holder and load theunprocessed substrate into the processing chamber in sequence by thesecond substrate holder while sequentially rotating the substratemounting table at the preset angle in the another direction. Here, themeaning of the expression of “moving at least one of the first substrateaccommodation unit and the first substrate holder up and down relativeto each other” implies, for example, moving the substrate up and downwhile the position of the substrate holder is fixed or moving thesubstrate holder up and down while the position of the substrate isfixed, and it may also imply moving both the substrate holder and thesubstrate up and down.

In accordance with the present disclosure, the substrate mounting tablethat mounts the plurality of substrates on a concentric circle isconfigured to be rotatable forward and backward. Thus, after the processof the substrate is performed in the processing chamber, by unloadingthe processed substrates from the processing chamber with the substrateholder used to load the unprocessed substrates into the processingchamber while rotating the substrate mounting table in a reversedirection to a rotation direction in which the unprocessed substratesare loaded into the processing chamber, the lastly loaded substrate canbe unloaded first. In this way, by accommodating the processedsubstrates in the substrate accommodation unit, which is in a standbymode after the loading of the unprocessed substrates is completed, insequence from the lastly loaded substrate, the transfer of thesubstrates between the processing apparatus and the substrateaccommodation unit can be carried out in a shorter period of time ascompared to conventional cases, while maintaining the original order ofthe processed substrate.

The substrate processing system may further include a substrate transferdevice configured to transfer the substrates between a substrateaccommodation vessel and the first and second substrate accommodationunits. The substrate transfer device may include substrate holdingmembers in multi-stages in a vertical direction so as to hold thesubstrates.

In the first substrate accommodation unit, a support configured tosupport a the substrate may be provided at a position where the supportis not overlapped with the first substrate holder when viewed from thetop, and in the second substrate accommodation unit, a supportconfigured to support a the substrate may be installed at a positionwhere the support is not overlapped with the second substrate holderwhen viewed from the top.

The first elevating mechanism may move the first substrate accommodationunit up and down, and the second elevating mechanism may move the secondsubstrate accommodation unit up and down. The first substrateaccommodation unit may include a first support moving mechanism thatmoves the support between the inside and the outside of the substrate.The second substrate accommodation unit may include a second supportmoving mechanism that moves the support between the inside and theoutside of the substrate. The first elevating mechanism may move thefirst substrate holder up and down, and the second elevating mechanismmay move the second substrate holder up and down.

The substrate processing system may further include a first supportingpin configured to support the substrate in the first substrateaccommodation unit; and a second supporting pin configured to supportthe substrate in the second substrate accommodation unit. The firstsubstrate accommodation unit may include a first support movingmechanism that moves the support between the inside and the outside ofthe substrate. The second substrate accommodation unit may include asecond support moving mechanism that moves the support between theinside and the outside of the substrate. The first elevating mechanismmay move the first substrate holder up and down, and the secondelevating mechanism may move the second substrate holder up and down.

In accordance with another aspect of the present disclosure, there isprovided a substrate processing method using a substrate processingapparatus including a processing chamber that performs a preset processon a plurality of substrates; a substrate mounting table, installedwithin the processing chamber, configured to mount the plurality ofsubstrates on a concentric circle and to be rotatable forward andbackward; a first substrate accommodation unit configured to accommodatethe plurality of substrates in multi-stages in a vertical direction; asecond substrate accommodation unit configured to accommodate theplurality of substrates in multi-stages in a vertical direction; a firstsubstrate holder configured to transfer the substrate between the firstsubstrate accommodation unit and the processing chamber; a secondsubstrate holder configured to transfer the substrate between the secondsubstrate accommodation unit and the processing chamber; a firstelevating mechanism configured to move at least one of the firstsubstrate accommodation unit and the first substrate holder up and downrelative to each other; and a second elevating mechanism configured tomove at least one of the second substrate accommodation unit and thesecond substrate holder up and down relative to each other. Thesubstrate processing method includes: transferring unprocessedsubstrates from the first substrate accommodation unit to the firstsubstrate holder by way of lowering the first substrate accommodationunit for accommodating the unprocessed substrates relative to the firstsubstrate holder, and loading the unprocessed substrates into theprocessing chamber in sequence by the first substrate holder whilesequentially rotating the substrate mounting table at a preset angle inone direction; performing the preset process on the plurality ofsubstrates in a batch-type manner within the processing chamber; andunloading processed substrates from the processing chamber by the firstsubstrate holder after the completion of the preset process,transferring the processed substrates into the first substrateaccommodation unit from the first substrate holder by way of raising thefirst substrate accommodation unit relative to the processed substrateof the first substrate holder, transferring unprocessed substrates fromthe second substrate accommodation unit to the second substrate holderby way of lowering the second substrate accommodation unit relative tothe second substrate holder and loading the unprocessed substrate intothe processing chamber in sequence by the second substrate holder whilesequentially rotating the substrate mounting table at the preset anglein the another direction.

Inside the first substrate accommodation unit, a support configured tosupport the substrate may be installed at a position where the supportis not overlapped with the first substrate holder when viewed from thetop. Inside the second substrate accommodation unit, a supportconfigured to support the substrate may be installed at a position wherethe support is not overlapped with the second substrate holder whenviewed from the top. The relative up/down movement of the firstsubstrate accommodation unit and the first substrate holder may becarried out by moving the first substrate accommodation unit up anddown, and the relative up/down movement of the second substrateaccommodation unit and the second substrate holder may be carried out bymoving the second substrate accommodation unit up and down.

The first substrate accommodation unit may include a first supportmoving mechanism that moves the support between the inside and theoutside of the substrate. The second substrate accommodation unit mayinclude a second support moving mechanism that moves the support betweenthe inside and the outside of the substrate. The support configured tosupport the substrate may be installed inside the first substrateaccommodation unit at a position where the support is not overlappedwith the first substrate holder when viewed from the top. The supportconfigured to support the substrate may be installed inside the secondsubstrate accommodation unit at a position where the support is notoverlapped with the second substrate holder when viewed from the top.The relative up/down movement of the first substrate accommodation unitand the first substrate holder may be carried out by moving the firstsubstrate holder up and down. The relative up/down movement of thesecond substrate accommodation unit and the second substrate holder maybe carried out by moving the second substrate holder up and down. Thesupport may be retreated to a position where the support is notoverlapped with the substrate, when viewed from the top, when thesupport does not support the substrate, and the support may be moved toa position where the support supports the substrate when the substrateis moved from below the support to above the support.

The substrate processing method may further include: a first supportingpin configured to support the substrate in the first substrateaccommodation unit; and a second supporting pin configured to supportthe substrate in the second substrate accommodation unit. The firstsubstrate accommodation unit may include a first support movingmechanism that moves the support between the inside and the outside ofthe substrate. The second substrate accommodation unit may include asecond support moving mechanism that moves the support between theinside and the outside of the substrate. Inside the first substrateaccommodation unit, the support configured to support the substrate maybe installed at a position where it is not overlapped with the firstsubstrate holder when viewed from the top. Inside the second substrateaccommodation unit, the support configured to support the substratethereon may be installed at a position where it is not overlapped withthe second substrate holder when viewed from the top. The relativeup/down movement of the first substrate accommodation unit and the firstsubstrate holder may be carried out by moving the first supporting pinup and down. The relative up/down movement of the second substrateaccommodation unit and the second substrate holder may be carried out bymoving the second supporting pin up and down. The support may beretreated to a position where the support is not overlapped with thesubstrate, when viewed from the top, when the support does not supportthe substrate, and the support may be moved to a position where itsupports the substrate when the substrate is moved from below thesupport to above the support.

In accordance with still another aspect of the present disclosure, thereis provided a substrate processing method using a substrate processingapparatus including a processing chamber that performs a preset processon a plurality of substrates in a batch-type manner; a substratemounting table, installed within the processing chamber, configured tomount the plurality of substrates on a concentric circle and to berotatable forward and backward; a first substrate accommodation unitconfigured to accommodate the plurality of substrates in multi-levels ina vertical direction; a second substrate accommodation unit configuredto accommodate the plurality of substrates in multi-levels in a verticaldirection; a first substrate holder configured to transfer the substratebetween the substrate mounting table and the first substrateaccommodation unit; and a second substrate holder configured to transferthe substrate between the substrate mounting table and the secondsubstrate accommodation unit. The substrate processing method includes:accommodating a plurality of unprocessed substrates in the firstsubstrate accommodation unit; transferring a single sheet of processedsubstrate from the substrate mounting table to the second substrateholder and accommodating the processed substrate in the second substrateaccommodation unit; performing, plural times, operations including:transferring the unprocessed substrate from the first substrateaccommodating unit onto the first substrate holder and transferring theprocessed substrate from the second substrate holder into the secondsubstrate accommodation unit, transferring the unprocessed substrate,which is delivered to the first substrate holder, onto the substratemounting table, mounting the unprocessed substrate, which is transferredonto the substrate mounting table, on the substrate mounting table andreceiving the processed substrate mounted on the substrate mountingtable by the second substrate holder, transferring the processedsubstrate, which is received from the substrate mounting table, into thesecond substrate accommodation unit, and rotating the substrate mountingtable at a preset angle in one direction; transferring the unprocessedsubstrate from the first substrate accommodation unit to the firstsubstrate holder and mounting the unprocessed substrate on the substratemounting table; performing the preset process on the plurality ofsubstrates within the processing chamber in a batch-type manner;unloading the processed substrate from the second substrateaccommodation and accommodating a plurality of unprocessed substrates inthe second substrate accommodation unit; transferring a single sheet ofprocessed substrate from the substrate mounting table to the firstsubstrate holder and accommodating the processed substrate in the secondsubstrate accommodation unit; performing, plural times, operationsincluding: transferring the unprocessed substrate from the secondsubstrate accommodating unit to the second substrate holder andtransferring the processed substrate from the first substrate holderinto the second substrate accommodation unit; transferring theunprocessed substrate, which is delivered to the second substrateholder, onto the substrate mounting table; mounting the unprocessedsubstrate, which is transferred onto the substrate mounting table, onthe substrate mounting table and receiving the processed substratemounted on the substrate mounting table by the first substrate holder;transferring the processed substrate, which is received from thesubstrate mounting table, into the first substrate accommodation unit;and rotating the substrate mounting table at a preset angle in theanother direction.

In accordance with the present disclosure, the transfer of thesubstrates can be carried out between the processing apparatus and thesubstrate accommodation unit in a shorter period of time as compared toconventional cases, while maintaining the original order of theprocessed substrates to be accommodated in the substrate accommodationunit.

BRIEF DESCRIPTION OF THE DRAWINGS

The disclosure may best be understood by reference to the followingdescription taken in conjunction with the following figures:

FIG. 1 is a plane view showing a schematic configuration of a substrateprocessing system in accordance with an embodiment of the presentdisclosure;

FIG. 2 is a diagram showing a schematic configuration of an arm havingsubstrate holders in multi-stages;

FIG. 3 is a longitudinal cross sectional view showing a schematicconfiguration of a substrate transfer apparatus and a processingapparatus;

FIG. 4 sets forth a diagram showing a schematic configuration of asubstrate accommodation unit;

FIG. 5 sets forth a diagram showing a positional relationship betweensupports and a substrate holder;

FIG. 6 is a diagram showing states where the substrate holder is movedto a raised position and a lowered position, respectively;

FIG. 7 provides a diagram showing a state where a substrate istransferred onto the substrate holder;

FIG. 8 is a diagram showing a state where the substrate holder is movedto a transfer position;

FIG. 9 is a diagram showing a state where a substrate mounting table isrotated at a preset angle after a substrate is mounted on the substratemounting table;

FIG. 10 is a diagram showing a state where a substrate is transferredonto the substrate holder;

FIG. 11 presents a time chart for a replacement of substrates;

FIG. 12 is a diagram showing a state where the substrate is transferredfrom elevating pins onto the substrate holder;

FIG. 13 is a diagram showing states where the substrate accommodationunit is located at a raised position and a lowered position,respectively;

FIG. 14 is a diagram showing a state where a substrate is transferredbetween the substrate accommodation unit and the substrate holder;

FIG. 15 is a diagram showing a state where the substrate mounting tableis rotated at a preset angle after the substrate is unloaded;

FIG. 16 is a diagram showing the substrate holder having a connectingmember;

FIG. 17 is a longitudinal cross-sectional view showing a schematicconfiguration of a substrate transfer apparatus and a processingapparatus in accordance with another embodiment of the presentdisclosure;

FIG. 18 is a diagram showing a schematic configuration of the substrateaccommodation unit having a support moving mechanism;

FIG. 19 is a diagram showing a state where the substrate holder israised up to a preset substrate height;

FIG. 20 is a diagram showing a state where the substrate is transferredbetween the substrate accommodation unit and the substrate holder;

FIG. 21 is a diagram showing a schematic configuration of the substrateaccommodation unit having supporting pins below the substrateaccommodation unit;

FIG. 22 presents a diagram showing a state where the substrate issupported by the supporting pins after the supports is retreated;

FIG. 23 is a diagram showing a positional relationship between thesubstrate holder and the elevating pins;

FIG. 24 is a plane view showing schematic configurations of thesubstrate transfer apparatus and a substrate processing apparatus;

FIG. 25 is a side view showing a schematic configuration of thesubstrate accommodation unit; and

FIG. 26 is a diagram showing an arrangement order of substrates in thesubstrate accommodation unit.

DETAILED DESCRIPTION OF THE INVENTION

Hereinafter, embodiments of the present disclosure will be described.FIG. 1 is a plane view showing a schematic configuration of a substrateprocessing system 1 in accordance with the present embodiment. Further,a semiconductor wafer, for example, is used as a substrate W of thepresent embodiment.

The substrate processing system 1 includes, as illustrated in FIG. 1, acassette station 2 where a plurality of substrates W are loaded andunloaded as a cassette unit; a processing station 3 including aplurality of processing apparatuses that perform, e.g., a batchprocessing on the plurality of substrates W; and a controller 4 thatcontrols the processing of the substrates W in the processing station 3.The cassette station 2 and the processing station 3 are connected as onebody.

The cassette station 2 includes a cassette mounting unit 10, a transferchamber 11 arranged adjacent to the cassette mounting unit 10. Thecassette mounting unit 10 is configured to mount a plurality of, e.g.,three, cassettes C, each capable of storing a plurality of substrates Was a substrate receiving vessel, in parallel in an X-axis direction(right and left directions in FIG. 1). Installed in the transfer chamber11 is a substrate transfer device 14. The substrate transfer device 14has a multi-joint arm 15 capable of revolution, expansion andcontraction, and elevation and is configured to transfer the substrate Wto the cassette C in the cassette mounting unit 10 and to substrateaccommodation units 50 and 51, which will be described later, installedin the processing station 3. The arm 15 includes, as illustrated in FIG.2, substrate holders 16 configured to hold the substrates. Themulti-stage substrate holders 16 are arranged in a vertical direction,so that the plurality of substrates W can be held by them at the sametime.

The processing station 3 includes two load lock chambers 20 serving astransfer chambers capable of being depressurized inside; processingapparatuses 22 and 23 for performing a batch process on the plurality ofsubstrates W; and a substrate transfer apparatus 24 for transferring asubstrate between the load lock chamber 20 and each of the processingapparatuses 22 and 23. The load lock chamber 20 is positioned betweenthe transfer chamber 11 and each of the processing apparatuses 22 and 23and connects the transfer chamber 11 with each of the processingapparatuses 22 and 23. The substrate transfer apparatus 24 is positionedinside the load lock chamber 20.

As illustrated in FIG. 3, provided at both sides of the load lockchamber 20 are an opening 25 through which the substrate W istransferred into the load lock chamber 20 by the arm 15, and an opening26 through which the substrate W is transferred between the load lockchamber 20 and the processing chamber 22 (23) by the substrate transferapparatus 24. Installed at a position corresponding to the opening 25between the transfer chamber 11 and the load lock chamber 20, and at aposition corresponding to the opening between the load lock chamber 20and the processing chamber 22 (23) are gate valves 27 and 28,respectively, which provide an airtight seal therebetween and areconfigured to be openable/closable.

The processing apparatus 22 includes a processing chamber 40 having anopening at a position corresponding to the opening 26 and capable ofbeing depressurized inside; and a substrate mounting table 41 having,e.g., a disk shape and installed inside the processing chamber 40 so asto mount a plurality of substrates W on a concentric circle. Thesubstrate mounting table 41 is configured such that it is rotatableforward and backward, i.e., rotatable in both clockwise direction andcounterclockwise direction when viewed from the top. The substratemounting table 41 is controlled by the controller 4. Further, in thepresent embodiment, the substrate mounting table 41 is configured tomount, e.g., 6 substrates W.

Installed below a position where the substrate W is mounted on thesubstrate mounting table 41 are elevating pins 42 serving as asupporting member for supporting and elevating the substrate W from thebottom. As illustrated in FIG. 3, the elevating pins 42 penetrate thesubstrate mounting table 41 in its thickness direction and can be movedvertically by an elevation driving mechanism (not illustrated). In acase where the substrate W is transferred, the elevating pins 42 areelevated up to a transfer position A (B), where the substrate W isreceived from the substrate holders 56 and 57, which will be describedlater, above the substrate mounting table 41, whereas in the othercases, the elevating pins 42 are sunk into the substrate mounting table41. Further, the batch processing performed in the processing chamber 40is, for example, a film forming process in the present embodiment.

The substrate transfer apparatus 24 includes substrate accommodationunits 50 and 51 that first accommodate the substrates W transferredbetween the transfer chamber 11 and the processing apparatus 22;transfer mechanisms 52 and 53 that transfer the substrate W between thesubstrate accommodation units 50 and 51 and the processing apparatus 22;and elevating mechanisms 54 and 55 that elevate the substrateaccommodation units 50 and 51 in a vertical direction. The substrateaccommodation units 50 and 51 are arranged in parallel in the X-axisdirection, for example, in FIG. 1, and the transfer mechanisms 52 and 53are positioned between the processing apparatus 22 and the substrateaccommodation units 50 and 51, respectively. The elevating mechanisms 54and 55 and the transfer mechanisms 52 and 53 are controlled by thecontroller 4.

The transfer mechanisms 52 and 53 include the U-shaped, for example,substrate holders 56 and 57 for holding the substrate W whentransferring the substrate W and moving mechanisms 58 and 59 for movingthe substrate holders 56 and 57, respectively. The substrate holders 56and 57 are configured to be moved by the moving mechanisms 58 and 59between above the elevating pins 42 of the substrate mounting table 41(transfer positions A and B) and below a substrate mounted within thesubstrate accommodation units 50 and 51 (standby positions C and D).Further, the moving mechanisms 58 and 59 desirably move the substrateholders 56 and 57 in a straight line so as to reduce a moving time ofthe substrate holders 56 and 57 between the transfer positions A and Band the standby positions C and D, and in the present embodiment, themoving mechanisms 58 and 59 are transfer rails each including, e.g., anon-illustrated driving mechanism.

The substrate accommodation units 50 and 51 are formed into asubstantially rectangular column shape with, e.g., open side surfacesfacing the transfer chamber 11 and the processing apparatus 22,respectively and an open bottom surface as illustrated in FIG. 4. At theclosed side surfaces of the substrate accommodation units 50 and 51,flat plate-shaped supports 70 for supporting the substrate W areinstalled in a vertical direction, for example, in a multi-stage at apredetermined, equal distance P and these supports 70 are configured toreceive the plurality of substrates W. The supports 70 are positionednot to be overlapped with the substrate holders 56 and 57 when viewedfrom the top as illustrated in FIG. 5, for example, such that when thesubstrate accommodation units 50 and 51 are elevated by the elevatingmechanisms 54 and 55, the supports 70 do not interfere with thesubstrate holders 56 and 57, respectively. The elevating mechanisms 54and 55 are configured such that when the substrate accommodation units50 and 51 are elevated, a lower end support 70 b can be raised to aposition (hereinafter, referred to as “raised position”) above thesubstrate holders 56 and 57 of the transfer mechanisms 52 and 53 and anupper end support 70 h can be lowered to a position (hereinafter,referred to as “lowered position”) below the substrate holders 56 and 57of the transfer mechanisms 52 and 53. That is, the elevating mechanisms54 and 55 are configured to elevate the substrate accommodation units 50and 51 through at least a distance Q between the upper end support 70 hand the lower end support 70 b of the substrate accommodation units 50and 51. Further, in FIG. 4, although the substrate accommodation units50 and are configured to have multi-stage shelves capable ofconcurrently accommodating, e.g., 6 substrates, corresponding to thenumber of the substrates on which a batch processing can be performed inthe processing apparatus 22, the number of the supports 70 is notlimited to the example shown in FIG. 4 but can be varied as required.Furthermore, the shape of the supports 70 can also be varied andmodified as long as they are capable of supporting the substrates Wwhile not overlapped with the substrate holders 56 and 57 when viewedfrom the top.

Since the configuration of the processing apparatus 23 is the same asthat of the above-described processing apparatus 22, redundantdescriptions thereof will be omitted herein. The processing apparatuses22 and 23 are not limited to the film forming apparatus and can be, forexample, a coating apparatus, an etching apparatus, a plasma apparatusor the like. Further, the processing apparatus 22 and the processingapparatus 23 may be different apparatuses from each other.

The substrate processing system 1 in accordance with the presentembodiment is configured as described above. Now, an operation of thesubstrate processing system 1 will be explained.

When processing of substrates W is performed, a plurality of unprocessedsubstrates W is taken out of the cassette C of the cassette station 2 bythe arm 15 of the substrate transfer device 14 and then accommodated inthe substrate accommodation units 50 and 51 in the load lock chamber 20in the same order as they are accommodated in the cassette C.

When the substrates W are completely accommodated in the substrateaccommodation unit 50, the substrate transfer device 14 is moved out ofthe load lock chamber 20, and the gate valve 27 installed at theatmospheric atmosphere side of the load lock chamber 20, i.e., at thetransfer chamber side is closed. Thereafter, the inside of the load lockchamber 20 is evacuated and depressurized to a predetermined pressurelevel.

Subsequently, by opening the gate valve 28 installed between the loadlock chamber 20 and the processing chamber 40, the inside of which ismaintained in a vacuum state, the substrate W in the substrateaccommodation unit 50 is loaded into the processing chamber 40 by thetransfer mechanism 52.

An operation of loading the substrate W into the processing chamber 40will be explained in detail. When the substrate W is loaded into theprocessing chamber 40, the substrate accommodation unit 50 is firstraised to the raised position by the elevating mechanism 54. At the sametime, the substrate accommodation unit 51 is lowered to the loweredposition by the elevating mechanism 55 (see FIG. 6). Then, the substrateholders 56 and 57 are moved to the standby positions C and D,respectively. Thereafter, the substrate accommodation unit 50 is lowerednear a position where a bottom surface of a substrate W1 mounted on thesupport 70 b is in direct contact with a top surface of the substrateholder 56. Then, from here, the substrate accommodation unit 50 isfurther lowered by a shorter distance than a distance P between theadjacent supports 70, e.g., about a half of the distance P. At the sametime, the substrate accommodation unit 51 is raised up by the samedistance as the substrate accommodation unit 50 is lowered (see FIG. 7).At this time, the supports 70 are positioned at the position where it isnot overlapped with the substrate holder 56 when viewed from the top, sothat by lowering the substrate accommodation unit 50 by about a half ofthe distance P, the supports 70 do not interfere with the substrateholder 56 and can be in vertically alternate positions. Further, whilethey pass each other, the substrate W1 mounted on the support 70 b istransferred to the substrate holder 56. Further, the substrate mountingtable 41 is rotated at a preset angle α in, e.g., clockwise direction bythe controller 4 which has detected the transfer of the substrate W1 toa substrate holder 56 and the transfer of the unprocessed substrates Wto the substrate holder 56. Here, the angle α is obtained by dividing arevolution angle (2π) of the substrate mounting table 41 by the number nof the substrates W to be mounted on the substrate mounting table 41. Inaddition, if the unprocessed substrate W is transferred onto thesubstrate holder 56 when a substrate is not yet mounted on the substratemounting table 41, as in the case of the first substrate loading, thesubstrate mounting table 41 need not be rotated.

The substrate holder 56 which holds the substrate W1 and the substrateholder 57 which does not hold the substrate W are introduced into theprocessing chamber 40 from the load lock chamber 20 by the transfermechanism 52 via the opening 26, and both are on standby at the transferpositions A and B, i.e., above elevating pins 42 a and 42 b (see FIG.8). Subsequently, the elevating pins 42 a are raised from the substratemounting table 41, so that the substrate W is transferred onto theelevating pins 42 a from the substrate holder 56. When the substrate W1is completely transferred to the elevating pins 42 a, the substrateholder 56 and 57 are moved back from the inside of the processingchamber 40 to the load lock chamber 20 and moved up to the standbypositions C and D. At the same time, the elevating pins 42 a arelowered, and, thus, the substrate W1 supported by the elevating pins 42a are mounted onto the substrate mounting table 41. If the substrate Wis detected to be mounted on the substrate mounting table 41 by thecontroller 4, the substrate mounting table 41 is rotated clockwise againat the preset angle α (see FIG. 9).

Then, while the substrate holders 56 and 57 are on standby at thestandby positions C and D, the substrate accommodation units 50 and 51are lowered and raised again, respectively, by the distance P so as totransfer a second substrate W2 to the substrate holder 56 (see FIG. 10).Subsequently, the substrate W2 is introduced into the processing chamber40 again by the transfer mechanism 52. At this time, the substratemounting table 41 has been rotated clockwise at the predetermined angleα, so that the substrate W2 can be mounted on a position where thesubstrate W1 was mounted as indicated by a dashed line in FIG. 9.Accordingly, the substrate W2 is transferred to the elevating pins 42 aat the transfer position A and mounted on the substrate mounting table41. By repeating this operation on a substrate W3 to W6 in sequence, allthe substrates W1 to W6 in the substrate accommodation unit 50 areloaded into the processing chamber 40.

When all the substrates W are loaded into the processing chamber 40, thegate valve 28 is closed. Then, the processing of the substrates W isperformed by the controller 4, so that a film forming process isperformed on each of the substrates W1 to W6. Further, while theprocessing of the substrates W is being performed in the processingapparatus 22, the empty substrate accommodation unit 51 is lifted up tothe raised position by the controller 4, and new unprocessed substratesW1 to W6 are accommodated therein by the arm 15. At this time, thesubstrate accommodation unit 50, which is located at the loweredposition in the empty state after the transfer of all the substrates W1to W6 is completed, remains thereat.

When the film forming process is completed in the processing apparatus22, the gate valve 28 is opened. Then, a processed substrate Wa isunloaded from the processing chamber 40 by the substrate holder 56 ofthe transfer mechanism 52 and accommodated in the substrateaccommodation unit 50, whereas the unprocessed substrate W is loadedinto the processing chamber 40 from the substrate accommodation unit 51.In this manner, the substrates W are replaced with each other.

There will be explained the replacement between the substrate Wa and thesubstrate W. FIG. 11 is a time chart showing the replacement between thesubstrate W and the substrate Wa. In FIG. 11, A to D show that thesubstrate holders 56 and 57 are positioned at the transfer positions Aand B or the standby positions C and D, and a dashed dotted arrow showswhere the substrates W and Wa are positioned. A section of each of thesubstrate accommodation units 50 and 51 illustrates a change in theheight direction when the substrate accommodation units 50 and 51 arelowered and raised from the raised position and the lowered position,respectively, by the distance P. To elaborate, when the substrateaccommodation unit 51 is lowered by the distance P from the raisedposition, its position is indicated on the time chart as a raisedposition (−P).

A substrate Wa6 on which a film forming process has been performed inthe processing chamber 40 is raised to the transfer position A by theelevating pins 42 a (see T1 in FIG. 11). Subsequently, the substrateholders 56 and 57 of the transfer mechanisms 52 and 53 move to thetransfer positions A and B (see T2 in FIG. 11) and, as they are, theelevating pins 42 a are lowered, whereby the substrate Wa6 istransferred from the elevating pins 42 a to the substrate holder 56 (seeT3 in FIG. 11 and FIG. 12). Thereafter, the substrate holders 56 and 57of the transfer mechanisms 52 and 53 are moved back to the load lockchamber 20 from the inside of the processing chamber 40 and moved to thestandby positions C and D (see T4 in FIG. 11). At this time, as for thevertical position of the substrate accommodation unit 50, it is locatedat the lowered position after the transfer of the unprocessed substratesW into the processing chamber 40 is completed as described above (seeFIG. 13). Then, the substrate accommodation unit 50 is raised by thedistance P, whereas the substrate accommodation unit 51 is lowered bythe same distance, i.e., the distance P in a reverse direction of thesubstrate accommodation unit 50. Accordingly, the substrate Wa6 istransferred from the substrate holder 56 to the substrate accommodationunit 50, and at the same time, the substrate W is transferred from thesubstrate accommodation unit 51 to the substrate holder 57 (see T5 inFIG. 11 and FIG. 14). Although it is illustrated in FIGS. 10 and 18 thatthe substrate holder 56 and 57 is raised up from a position indicated bya dashed line to a position indicated by a solid line, respectively,this just shows a change in a relative position between the substrateaccommodation units 50 and 51 and the substrate holders 56 and 57 in aheight direction for convenience of illustration. It is not thesubstrate holders 56 and 57 but the substrate accommodation units 50 and51 that actually moves.

Further, the substrate Wa6 is unloaded from the processing chamber 40,and the substrate mounting table 41 is rotated at the preset angle α inthe reverse direction to the rotation direction before the processing ofthe substrate W is performed, i.e., in counterclockwise direction.Accordingly, a new unprocessed substrate W1 can be mounted on a positionof the substrate mounting table 41 below the transfer position B (seeFIG. 14). Then, after a rotation of the substrate mounting table 41 isfinished, the substrate Wa5 is on standby with a support by theelevating pins 42 a (see T6 in FIG. 11). Thereafter, the substrateholder 57 which holds the unprocessed substrate W1 and the substrateholder 56 which does not hold the substrate are introduced into theprocessing chamber 40 (see T7 in FIG. 11). Subsequently, the processedsubstrate Wa5 is transferred from the transfer position A to thesubstrate holder 56 by lowering the elevating pins 42 a, whereas thesubstrate W is transferred from the transfer position B to the elevatingpins 42 b by raising the elevating pins 42 b (see T8 in FIG. 11). Then,the substrate holders 56 and 57 are moved back to the load lock chamber20 and moved to the standby positions C and D (see T9 in FIG. 11).Thereafter, the substrate accommodation units 50 and 51 are lowered andraised, respectively, so that the substrate W2 is transferred from thesubstrate accommodation unit 51 to the substrate holder 57 and thesubstrate Wa5 is transferred from the substrate holder 56 to thesubstrate accommodation unit 50 (see T10 in FIG. 11). Accordingly,between T8 and T10 in FIG. 11, for example, the substrate Wa5 istransferred from the substrate holder 56 to the substrate accommodationunit 50 and at the same time, the substrate W2 is transferred from thesubstrate accommodation unit 51 to the substrate holder 57. Further, atthe same time, the substrate mounting table 41 is rotatedcounterclockwise at the predetermined angle α, and these operations areperformed until Tn in FIG. 11 when all the substrates W and Wa arecompletely replaced. Thereafter, the film forming process is performedagain when all the substrates within the processing chamber 40 arereplaced with unprocessed substrates W. In this way, the processedsubstrates Wa1 to Wa6 are accommodated in the substrate accommodationunit 50 in the same order as the unprocessed substrates W1 to W6 areaccommodated therein. Thereafter, the film forming process is performedagain when all the substrates W within the processing chamber 40 arereplaced with the unprocessed substrates.

During the film forming process, the processed substrates Waaccommodated in the substrate accommodation unit 50 are returned backinto the cassette C via the arm 15, and new unprocessed substrates W arethen accommodated in the substrate accommodation unit 50 by the arm 15.After the completion of the film forming process, while the substratemounting table 41 is being rotated backward, i.e., in the clockwisedirection, the processed substrates Wa are sequentially accommodated inthe substrate accommodation unit once used to store the unprocessedsubstrates W loaded into the processing chamber, i.e., in the substrateaccommodation unit 51 in the same order as that in case of substrateaccommodation unit 50. Concurrently, the unprocessed substrates W withinthe substrate accommodation unit 50 are loaded into the processingchamber 40 in sequence, and the above-described series of processes arerepeated. Further, since the process performed in the processingapparatus 23 is the same as that performed in the processing apparatus22, description thereof will be omitted here.

In accordance with the above-discussed embodiment of the presentdisclosure, the substrate mounting table 41, which mounts the pluralityof substrates W on the concentric circle, is configured to be rotatableforward and backward. Accordingly, after the processing of thesubstrates W is performed in the processing chamber 40, it is possibleto unload the processed substrates Wa from the processing chamber 40 by,e.g., the substrate holder 56, which is used to load the unprocessedsubstrates W into the processing chamber, while rotating the substratemounting table in the reverse direction as it is rotated when theunprocessed substrates W are loaded into the processing chamber. In thisway, the processed substrates Wa can be accommodated in the substrateaccommodation unit 50 in sequence starting from, e.g., the lastly loadedsubstrate Wa6. Therefore, by accommodating the processed substrates Wain sequence from the lastly loaded substrate W in, e.g., the substrateaccommodation unit 50, which is in standby mode after the loading of theunprocessed substrates W into the processing chamber 40 is completed,the transfer of the substrates can be carried out between the processingapparatus 22 and the substrate accommodation unit 50 in a shorter periodof time as compared to conventional case, while maintaining the originalorder of the processed substrates Wa to be accommodated in the substrateaccommodation unit 50.

Furthermore, the supports 70 of the substrate accommodation units 50 and51 are provided at positions where they are not overlapped with thesubstrate holders 56 and 57 when viewed from the top and the substrateaccommodation units 50 and 51 are configured to be elevated by theelevating mechanisms 54 and 55. Thus, if the substrate accommodationunits 50 and 51 move by the distance P in a vertical direction which isan interval between the supports 70 when the substrate holders 56 and 57have been introduced into the substrate accommodation units 50 and 51,i.e., on standby positions C and D, the substrates W and Wa can betransferred from/to the supports 70 while the substrate holders 56 and57 and the supports 70 passed each other. Therefore, in case, forexample, the substrate W is transferred to the upper end support 70 h ofthe substrate accommodation unit 50, there is no need to vertically movethrough a distance Q in a height direction of the substrateaccommodation unit 50, for example, as a conventional transfer arm.Accordingly, by reducing a time for replacing the substrates W and Wabetween the processing apparatus 22 and the substrate accommodationunits 50 and 51, throughput of the substrate processing system 1 can befurther improved.

In the above embodiment, the elevating mechanisms 54 and 55 areinstalled with respect to the substrate accommodation units 50 and 51,respectively. However, one elevating mechanism, for example, may beinstalled with respect to the substrate accommodation units 50 and 51and a gear, for example, serving as a driving force transmissionmechanism for dividing and transmitting a driving force of the elevatingmechanism may be installed. Further, the substrate accommodation unit 50and the substrate accommodation unit 51 may be configured to move in areverse direction to each other at the same time in a verticaldirection. Accordingly, there is no need to install the independentelevating mechanisms 54 and 55 for the substrate accommodation units 50and 51, so that it is possible to compactly design the substratetransfer apparatus 24.

Instead of the moving mechanisms 58 and 59 installed with respect to thesubstrate holders 56 and 57, respectively, one moving mechanism 60 maybe installed with respect to the substrate holders 56 and 57 asillustrated in FIG. 16. The substrate holder 56 and the substrate holder57 may be joined to, e.g., a connecting member 61 which is formed in asubstantial U shape having a downwardly protruding curve at the movingmechanism 60. In this case, there is no need to install the independentmoving mechanisms 58 and 59 for the substrate holders 56 and 57, so thatit is possible to compactly design the substrate transfer apparatus 24.In FIG. 16, the reason why the connecting member 61 has the substantialU shape having a downwardly protruding curve is to install a verticalportion 61 a at the connecting member 61 such that the connecting member61 do not interfere with the substrate accommodation units 50 and 51when the substrate holders 56 and 57 move. Therefore, a shape of theconnecting member 61 is not limited to the shape shown in FIG. 16 aslong as it does not interfere with the substrate accommodation units 50and 51. Further, a horizontal portion 61 b of the connecting member 61has a length which does not cause the vertical portion 61 a of theconnecting member 61 to interfere with the opening 26 of the load lockchamber 20 when the substrate holders 56 and 57 move to the transferpositions A and B in the processing chamber 40.

In case of using the connecting member 61, a driving unit 60 a of themoving mechanism 60 is positioned below the opening 25 of the load lockchamber 20. Accordingly, in this case, if the driving unit 60 a, forexample, is positioned at a space which protrudes toward the transferchamber 11 and is located below the opening 25 of the load lock chamber20 at the side of the transfer chamber 11 as illustrated in, e.g., FIG.17, it is possible to arrange the moving mechanism 60 without changing asize of the load lock chamber 20.

In the above-described embodiment, the substrate accommodation units 50and 51 are elevated by the elevating mechanisms 54 and 55, respectively.However, as illustrated in, e.g., FIG. 18, it may be possible to installa support moving mechanism 71 that moves the supports 70 of thesubstrate accommodation units 50 and 51 between an inner side and anouter side of the substrates W and Wa, i.e., in the X-axis direction ofFIG. 1 and the substrate holders 56 and 57 may be elevated by theelevating mechanisms 54 and 55. For example, when the substrate W andthe substrate Wa are transferred to the substrate accommodation units 50and 51, respectively, by the substrate transfer apparatus 24 configuredas stated above, the substrate holders 56 and 57 are moved to thestandby positions C and D, respectively while the substrate Wa is heldby, e.g., the substrate holder 57. Subsequently, as illustrated in,e.g., FIG. 19, the substrate holder 57 is raised up to a predeterminedheight while the supports 70 are moved back by the support movingmechanism 71 to a position where the supports 70 are not overlapped withthe substrate Wa when viewed from the top. At the same time, by raisingthe substrate holder 56 to a predetermined height, the substrate W istransferred from the supports 70 to the substrate holder 56. Further, asillustrated in, e.g., FIG. 18, when the substrate holder 56 is raised,it does not hold the substrate W. Accordingly, since the substrate Wdoes not interfere with the supports 70, there is no need to move backthe supports 70 of the substrate accommodation unit 50 at this time.After the substrate holders 56 and 57 are raised to the predeterminedheights, the supports 70 in the substrate accommodation unit 50 is movedback to a position where the supports 70 does not interfere with thesubstrate W, and then the substrate holder 56 is lowered. In thesubstrate accommodation unit 51, the supports 70 are returned to aposition where it was before being moved back, and then the substrateholder 57 is lowered so as to transfer the substrate Wa to the supports(see FIG. 20). Accordingly, the substrate holder 57 is raised via aspace between the supports 70 while holding the substrate Wa and thenperforms the transfer of the substrate Wa. In this case, there is noneed for the transfer arm to perform a revolving operation which hasbeen made by a conventional transfer arm between the substrateaccommodation units 50 and 51 serving as buffer areas and the processingchamber 40 when a substrate is transferred. Therefore, it is possible toreduce a time for replacing the substrates W and Wa between theprocessing apparatus 22 and the substrate accommodation units 50 and 51.Accordingly, throughput of the substrate processing system 1 can beimproved.

In addition to the above-described method of moving the substrateaccommodation units 50 and 51 up and down as well as elevating thesubstrate holders 56 and 57 after the supports 70 move back, forexample, the substrates W and Wa can be transferred between thesubstrate accommodation units 50 and 51 and the substrate holders 56 and57 by installing supporting pins 80 and 81, serving as anothersupporting units for supporting the substrates W and Wa, below thesubstrate accommodation units 50 and 51 and elevating the supportingpins 80 by the elevating mechanisms 54 and 55 as illustrated in FIG. 21.To be specific, the supporting pins 80 and 81 are installed at aposition, where the supporting pins 80 and 81 do not interfere with thesubstrate holders 56 and 57 when the substrate holders 56 and 57 movefrom the standby positions C and D toward the processing apparatus 22,below the substrate accommodation units 50 and 51 including the supportmoving mechanism 71 that moves back the supports to a position, e.g.,where the supports 70 do not interfere with the substrates W and Wa.Further, for example, the substrate holder 56 is moved to the standbyposition C while it does not hold the substrate W, and then thesupporting pins 80 are raised so as to support the substrate W. At thesame time, the substrate holder 57 is moved to the standby position Dwhile it holds the substrate Wa, and then the supporting pins 81 areraised so as to support the substrate Wa (see FIG. 22). Subsequently,when the supports 70 are moved back in the substrate accommodation unit50 and then the supporting pins 80 are lowered, the substrate W istransferred between the supporting pins 80 and the substrateaccommodation unit 50. In the substrate accommodation unit 51, thesupports 70 are returned to a position where it was before being movedback, and then the supporting pins 81 are lowered, and thus, thesubstrate Wa is transferred between the supporting pins 81 and thesupports 70. At this time, the supporting pins 80 and 81 are installedat positions where the supporting pins 80 and 81 do not interfere withthe substrate holders 56 and 57 when the substrate holders 56 and 57 aremoved from the standby positions C and D toward the processing apparatus22. Therefore, if when the substrate W is transferred from the substrateaccommodation unit 50 to the substrate holder 56, for example, thesubstrate W is supported in advance by the supporting pins 80 at aposition higher than the standby position C by P/2, the substrate W canbe transferred between the substrate accommodation unit 50 and thesubstrate holder 56 by the minimum operation, i.e., by lowering thesupporting pins by a half of the distance P after the substrate holder56 is moved to the standby position C. Therefore, a time for replacingthe substrates W and Wa between the processing apparatus 22 and thesubstrate accommodation units 50 and 51 can be reduced and throughput ofthe substrate processing system 1 can be improved.

By way of example, the supporting pins 80 may be arranged to surroundthe substrate holders 56 and 57 as illustrated in FIG. 23 in order notto interfere with the substrate holders 56 and 57 when the substrateholders 56 and 57 are moved from the standby positions C and D towardthe processing apparatus 22.

In the above-described embodiment, although the transfer mechanisms 52and 53 are slid by the moving mechanisms 58 and 59 in a horizontaldirection, the moving mechanism may have an expandable and contractiblearm in the same manner as the substrate transfer device 14, for example.

Furthermore, in the above-described embodiment, although the substrateis transferred between the cassette C of the cassette station 2 and thesubstrate accommodation units 50 and 51 by the one substrate transferdevice 14 with the arm 15 having the plurality of substrate holders 16arranged in the multi stages, it may be also possible to install aplurality of arms (not shown) having, e.g., one substrate holder 16 orto install a plurality of substrate transfer devices 14 as long as thereplacement of the substrates W and Wa can be carried out in thesubstrate accommodation unit 50 and 51 without loss.

The above-described embodiment is provided for the purpose ofillustration with reference to the accompanying drawings but the presentinvention is not limited thereto. It would be understood by thoseskilled in the art that various changes and modifications may be madewithout changing technical conception and essential features of thepresent invention and all modifications and embodiments are included inthe scope of the present invention. The present invention is not limitedto the above-described embodiment and can be varied in many ways. Thepresent disclosure can be applied to a case where a substrate is otherthan a wafer, such as a flat panel display (FPD), a mask reticle for aphoto mask or the like. Further, the present disclosure can be appliedto a case where a process performed in a processing apparatus is otherthan a CVD process, such as a plasma process, e.g., an etching process,or the like. Furthermore, the present disclosure is not limited to theshape of the transfer arm described in the present embodiment and thuscan be applied to other various shapes of transfer arms.

INDUSTRIAL APPLICABILITY

The present disclosure is useful in transferring a substrate withrespect to a processing apparatus for performing a predetermined processon the substrate.

What is claimed is:
 1. A substrate processing system comprising: aprocessing chamber that performs a preset process on a plurality ofsubstrates in a batch-type manner; a substrate mounting table, installedwithin the processing chamber, configured to mount the plurality ofsubstrates on a single circle and to be rotatable with respect to acentral axis of the substrate mounting table in a clockwise directionand a counterclockwise direction; a cassette station including acassette mounting unit and a transfer chamber arranged adjacent to thecassette mounting unit; a load lock chamber installed between theprocessing chamber and the transfer chamber; a first substrateaccommodation unit configured to accommodate the plurality of substratesin multi-stages in a vertical direction; a second substrateaccommodation unit configured to accommodate the plurality of substratesin multi-stages in a vertical direction; a first substrate holderconfigured to hold the substrate transferred between the first substrateaccommodation unit and the processing chamber; a second substrate holderconfigured to hold the substrate transferred between the secondsubstrate accommodation unit and the processing chamber; a firstelevating mechanism configured to move at least one of the firstsubstrate accommodation unit and the first substrate holder up and downrelative to each other in order to transfer the substrate between thefirst substrate accommodation unit and the first substrate holder; asecond elevating mechanism configured to move at least one of the secondsubstrate accommodation unit and the second substrate holder up and downrelative to each other in order to transfer the substrate between thesecond substrate accommodation unit and the second substrate holder; anda controller configured to control a rotation of the substrate mountingtable, an up/down movement of the first and second elevating mechanismsand the transfer of the substrates by the first and second substrateholders, wherein the first and second substrate accommodation units, thefirst and second substrate holders, and the first and second elevatingmechanisms are installed within the load lock chamber, wherein the firstsubstrate accommodation unit accommodating unprocessed substrates islowered relative to the first substrate holder in order to transfer theunprocessed substrates from the first substrate accommodation unit tothe first substrate holder, and the first substrate holder loads theunprocessed substrates into the processing chamber in sequence whilesequentially rotating the substrate mounting table at a preset angle inone direction, wherein the processing chamber performs the presetprocess on the plurality of substrates and, wherein the first substrateholder unloads processed substrates from the processing chamber afterthe completion of the preset process; the first substrate accommodationunit is raised relative to the first substrate holder in order totransfer the processed substrates into the first substrate accommodationunit from the first substrate holder; the second substrate accommodationunit for accommodating unprocessed substrates is lowered relative to thesecond substrate holder in order to transfer the unprocessed substratesfrom the second substrate accommodation unit onto the second substrateholder; and, the second substrate holder loads the unprocessed substrateinto the processing chamber in sequence while sequentially rotating thesubstrate mounting table at the preset angle in another direction. 2.The substrate processing system of claim 1, further comprising: asubstrate accommodation vessel mounted at the cassette mounting unit;and a substrate transfer device, installed within the transfer chamber,configured to transfer the substrates between the substrateaccommodation vessel and the first and second substrate accommodationunits, wherein the substrate transfer device includes substrate holdingmembers in multi-stages in a vertical direction so as to hold thesubstrates.
 3. The substrate processing system of claim 1, wherein, inthe first substrate accommodation unit, a support configured to supportthe substrate is provided at a position where the support is notoverlapped with the first substrate holder when viewed from the top, andin the second substrate accommodation unit, a support configured tosupport the substrate is installed at a position where the support isnot overlapped with the second substrate holder when viewed from thetop.
 4. The substrate processing system of claim 3, wherein the firstelevating mechanism moves the first substrate accommodation unit up anddown, and the second elevating mechanism moves the second substrateaccommodation unit up and down.
 5. The substrate processing system ofclaim 3, wherein the first substrate accommodation unit includes a firstsupport moving mechanism that moves the support between inside andoutside of the substrate, the second substrate accommodation unitincludes a second support moving mechanism that moves the supportbetween the inside and the outside of the substrate, the first elevatingmechanism moves the first substrate holder up and down, and the secondelevating mechanism moves the second substrate holder up and down. 6.The substrate processing system of claim 3, further comprising: a firstsupporting pin configured to support the substrate in the firstsubstrate accommodation unit; and a second supporting pin configured tosupport the substrate in the second substrate accommodation unit,wherein the first substrate accommodation unit includes a first supportmoving mechanism that moves the support between inside and outside ofthe substrate, the second substrate accommodation unit includes a secondsupport moving mechanism that moves the support between the inside andthe outside of the substrate, the first elevating mechanism moves thefirst substrate holder up and down, and the second elevating mechanismmoves the second substrate holder up and down.